Andayani, Regina, and Friardi Ismed. “Analysis of α-Mangostin in the Herbal Drinks of Mangosteen Rind (Garcinia Mangostana L.) by Thin Layer Chromatography-Densitometric Method”. Jurnal Sains Farmasi & Klinis, vol. 4, no. 1, Dec. 2017, pp. 61-66, doi:10.29208/jsfk.2017.4.1.195.